<template>
  <div id="App">
    <!-- <backtop/> -->
    <top/>
    <!-- <home/> -->
    <router-link to="/home" class="yincang">主页</router-link>
    <router-view/>
  </div>
</template>

<script>
  import top from '@/components/home/top/top'
  import home from '@/components/home'
  // import backtop from '@/components/backtop/backtop'

export default {
  name: 'App',
  created () {
    // 在页面加载时读取sessionStorage里的状态信息
    if(sessionStorage.getItem("store")) {
      this.$store.replaceState(Object.assign({}, this.$store.state, JSON.parse(sessionStorage.getItem("store"))))
    } 

    // 在页面刷新时将vuex里的信息保存到sessionStorage里
    window.addEventListener("beforeunload", () => {
      sessionStorage.setItem("store", JSON.stringify(this.$store.state))
    })
  },
  components: {
    top,
    home
  }
}
</script>

<style scoped>
  * {
    margin: 0;
    padding: 0;
  }

  ul, ol {
    list-style: none;
  }

  .yincang {
    display: none;
  }
</style>
